Friday, November 4, 2011

Global Nephrology

Editor - CKD is a a global epidemic and screening for CKD has become an international priority. In the first of a series of articles, I have invited leaders from various parts of the world to write about their personal experiences and thoughts about screening for CKD. Here, Dr. Sanjib Kumar Sharma talks about his efforts in CKD screening and prevention in Nepal using the help of the International Society of Nephrology (ISN) (see link). Dr. Sharma is Professor of Internal Medicine, BP Koirala Institute of Health Science and "In-charge" of the  Nephrology and Endocrinology units and Chief of the Diabetes and Kidney Disease Prevention Clinic in Dharan, Nepal. Dr. Sharma graduated in medicine at Dibrugarh University in India with a University Merit Scholarship and completed his post-graduate training (MD) at Assam Medical College, also in Dibrugarh. He was an ISN Fellow in Clinical Epidemiology and Chronic Kidney Disease prevention at the Mario Negri Institute of Pharmacological Research, Bergama, Italy from 2005-2006. He is a member of several ISN committees, including the COMGAN Research and Prevention Committee, and the South East Asia Committee (COMGAN).

COMMENTARY - "CKD Screening in Nepal" – Dr. Sanjib Kumar Sharma

Chronic kidney disease (CKD) is a worldwide public health problem. Nepal is one of the poorest countries in the world and has grossly limited treatment options for CKD and ESRD. For a population of 27 million, there are 16 renal physicians, most of the dialysis centers are located in the major cities, and there is very limited public money expended on health care. Indeed, only two nephrologists serve outside the capital city Kathmandu.

Renal Replacement Therapy in Nepal

In Nepal the cost per month treatment per patient for hemodialysis is more than the per capita gross national product (GNP) of the country, making renal replacement therapy (RRT) a rare choice for the majority of individuals who develop ESRD. Twice-a-week hemodialysis is the usual practice with re-processing and re-use of the dialyzer being common. The cost of hemodialysis is approximately US $250 to 300/month at government centers, and US $300 to 500/month at private centers, and this excludes the cost of erythropoietin and other medications. The cost for CAPD is even higher. Although kidney transplant was initiated in 2008 in Nepal, it remains out of reach for most of the ESRD population due to cost and the unavailability of either living or deceased donors.

Another major issue is the limitation of available dialysis facilities. Dialysis is available in only the 5 major cities of Nepal. Therefore, because of the cost and complexity of RRT, less than 5% of the population who develop ESRD receives any form of renal replacement therapy.

The very limited resources for nephrology care underscore the urgent need for establishing preventive programs for renal disease. Before advocating for action on prevention, however, it would be useful to understand the prevalence of CKD and its risk factors, but so far even this information is unavailable in Nepal.

Screening for CKD in Nepal

In the international nephrology community there is a broad consensus that screening programs should be targeted towards individuals at “high risk” of kidney disease. It is argued that this is cost-effective. These “high-risk” individuals include those with diabetes, hypertension and proteinuria.

In Nepal and I would guess in other low income countries, screening targeted at people aware they have risk factors for kidney disease would mean that large chunks of the population with kidney disease risk factors would go remain unscreened.

In Nepal, people do not seek medical advice regularly. Foremost among the reasons for this is a lack of awareness of disease. However, there is also this belief that the absence of symptoms must mean good health even though there might be a family history or risk factors for kidney disease. There is also the problem of losing a day of wages from missing work to go the doctor.

In Nepal our studies show that is a very low awareness for diabetes, hypertension and proteinuria (1). Individuals are referred to nephrologists very late, frequently at the point that they need imminent dialysis. Because of the limited resources, nothing much can be done for these patients and physicians are left with the unenviable task of pronouncing a “death sentence verdict”.

I recognize that there is no easy solution to the problem. Chronic diseases are on the rise and nephrology is not the only health issue that the government has to address. Infection, gastrointestinal, maternal and child health issues continue to strain both medical and financial resources. Furthermore, Nepal’s public health infrastructure remains dilapidated.
Our own experience in a community-based screening and intervention program is based on the ISN's model - "Program for Detection and Management of Chronic Kidney Disease, Hypertension, Diabetes and Cardiovascular Disease in Developing Countries" (KHDC). We observed that impaired kidney function, proteinuria, hypertension, diabetes, smoking, sedentary life style and obesity are common even in younger participants. Consequently, incident cases of CKD, proteinuria and cardiovascular disease will likely increase substantially over the coming decades.

Community-based Screening: KHDC-Nepal

Fig.1: Screening for CKD
We believe that a comprehensive and integrative approach to CKD prevention that embodies structural, community and individual strategies is necessary. Based on recommendations from experts from the International Society of Nephrology (2) and the experience of others in neighboring countries (3) we have pursued a three-pronged approach to CKD.

(1) Epidemiological surveillance
(2) Primary prevention (preventing disease in healthy populations); (3) Secondary prevention (preventing complications and improving quality of life in affected communities). 

Our goal has been to develop interventions within a 'multifaceted and multi-institutional' framework that makes efficient use of existing economic and human resources even though both are currently inadequate.

Fig. 2: Awareness Bike Ride
How have we done this in Nepal? We have started with a large-scale screening and management program to help create awareness among general public. The screening process is depicted in Fig. 1, and an example of the awareness rally is shown in Fig.2 -- young doctors on bicycles with slogans highlighting kidney disease. We have targeted the general population rather than high-risk groups because we believe that this is the only way to identify people with early stages of kidney disease.

We have collaborated with members of the local community and their leaders.  We have sought to develop large and sustained educational programs for people and healthcare workers while in parallel developed an organizational network of doctors, medical students, nurses and volunteers under an academic coordinating center. This collaborative model has been necessary to assure smooth and reliable screenings and, far more important, to efficiently use the limited resources and interventions.

We believe that our collaborative approach is essential to help reverse the negative trend in the incidence of kidney disease in an emerging country like Nepal and overcome the cost and complexity of RRT which is currently beyond the reach of most citizens living in our country.

References
1. Sharma SKZou HTogtokh AEne-Iordache B, et al. Burden of CKD, proteinuria, and cardiovascular risk among Chinese, Mongolian, and Nepalese participants in the International Society of Nephrology screening programs. Am J Kidney Dis 2010; 56(5): 915-27.
2. Li PK, Chow MK,, Matsuo S et al Asian chronic kidney disease best practice recommendations: Positional statements for early detection of chronic kidney disease from Asian Forum for Chronic Kidney Disease Initiatives (AFCKDI). Nephrology 16 (2011) 633–641
3. Mani MK. Experience with a program for prevention of chronic renal failure in India. Kidney Int Suppl 2005; S75–S78.